GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Bothriochloa longipaniculata

HABIT Perennial; caespitose. Culms 90–100 cm long; 3–4 mm diam. Culm-internodes distally glabrous. Culm-nodes glabrous. Leaves cauline. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane; 2.8–4.6 mm long. Leaf-blades 17–22 cm long; 4–5 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes numerous; borne along a central axis; 3–5 cm long. Central inflorescence axis 7–15 cm long. Rhachis fragile at the nodes; flattened; villous on margins. Rhachis hairs 6.6–9.8 mm long. Rhachis internodes linear; 2.3–2.6 mm long. Rhachis internode tip transverse.

Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear; flattened; 2.5–3.8 mm long; with a translucent median line (also present in internodes); villous; with 6–8.7 mm long hairs.

STERILE SPIKELETS Companion sterile spikelets well-developed; lanceolate; 2.7–3.6 mm long.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 3.8–4.3 mm long; 0.6–0.9 mm wide; falling entire; deciduous with accessory branch structures. Spikelet callus pilose; base obtuse; attached transversely. Spikelet callus hairs 1.2–2.4 mm long.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume ovate; 1 length of spikelet; cartilaginous; without keels; keel-less except near apex; 7 -veined. Lower glume surface flat; without pits; glabrous, or puberulous; hairy below. Lower glume hairs 0–0.8 mm long. Upper glume lanceolate; 1-keeled.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; 3 mm long; hyaline. Fertile lemma linear; hyaline; without keel. Lemma apex entire; awned; 1 -awned. Principal lemma awn apical; geniculate; 11.8–15.5 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.

FLOWER Anthers 3.

DISTRIBUTION North America: south-central USA. South America: Mesoamericana, Brazil, and southern South America.

NOTES Andropogoneae. Scrivanti 2012.

ADDITIONAL CHARACTERS Translucent line as wide as sides.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.